class_docstr: Test the BaseFileHandler.
class_docstr_tok: ["Test","the","BaseFileHandler","."]
docstr: Set up the test.
docstr_tok: ["Set","up","the","test","."]
code: def setUp(self):
      """Set up the test."""
      self.fh = BaseFileHandler(
          "filename", {"filename_info": "bla"}, "filetype_info"
      )
  
file_path: satpy/satpy/tests/test_file_handlers.py
imports: import unittest
  from datetime import datetime, timedelta
  from unittest import mock
  import numpy
  import pytest
  from satpy.readers.file_handlers import BaseFileHandler, open_dataset
  from satpy.tests.utils import FakeFileHandler
label_desc: Use image node_id 1 for calling the TestBaseFileHandler obj's underlying member method code with example usage: obj.setUp() without return types